Horizontal guns welding positioner, two seam welding positioner while girth welding equipment, a complete variety of round, circular weld universal automatic welding equipment. Can be used for high quality welding of carbon steel, low alloy steel, stainless steel, aluminum and its alloys and other materials, and can choose welding (filler wire or without filler wire), MIG welding, plasma welding and other welding power source consisting of a set of girth automatic welding systems. Can be widely used in hydraulic cylinders, car direction planes, drive shaft, air reservoir, chemical and medical containers, gas tank, fire equipment, mining and production lines with a roller and liquid products such as welded tube.